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41 lines
838 B
C
41 lines
838 B
C
/*
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* Copyright 2014-2023 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gmssl/sm2.h>
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#include <gmssl/error.h>
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int main(void)
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{
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SM2_KEY sm2_key;
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uint8_t dgst[32] = {0};
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SM2_SIGNATURE sig;
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uint8_t der[SM2_MAX_SIGNATURE_SIZE];
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uint8_t *p = der;
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size_t derlen = 0;
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sm2_key_generate(&sm2_key);
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sm2_do_sign(&sm2_key, dgst, &sig);
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if (sm2_signature_to_der(&sig, &p, &derlen) != 1) {
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fprintf(stderr, "sm2_signature_to_der() error\n");
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return -1;
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}
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format_bytes(stdout, 0, 0, "signature", der, derlen);
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printf("signature length = %zu bytes\n", derlen);
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return 0;
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}
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